Basic concept


Composite = Matrix
+ Reinforcement
Composites are comprised of two or more materials working together, where each constituent material retains its unique identity within the composite and contributes its own structural properties, yet upon combination the resulting material has properties superior to those of its constituents. It consists of Reinforcement and Matrix.


Origin It was originated from a dense brick reinforced in order to increase the strength of bricks in ancient Egypt.
1940s Development of glass fiber composite material.
Beginning of Fiber Reinforcement Plastic(FRP) industry.
1960s Development of Kevlar fiber that is rigid and light by Dupont.
Development of a variety of high-performance fibers. (Boron, SiC, Carbon, Alumina)
1980s Korean domestic production of carbon fiber.
Establishment of Korean Society for Composite Materials.
2000s Application in various fields such as aircraft, boats, bridges etc.

Advantages and Disadvantages of composites.

Advantages Disadvantages
Multifunctional materials → various design
Corrosion resistant
Resistance to metal fatigue, crack, breakdown
Easily molded to shape
Low coefficient of expansion
Simple manufacturing and assembly process → purchasing and other cost saving
Assemble by parts → Lower tooling costs
Possibility of automation
High strength and stiffness-to-weight ratio → fuel saving and long cruising range
Expensive materials
Low modulus of elasticity
Low fire retardant or low resistance to flame
Slow forming speed
Easily damaged
Complexity of design and analysis
Low strength on high temperature
Complex and expensive inspection

Application of composite

Light weight | Low coefficient of expansion | High elasticity
Aerospace Fuselage, Wing, Cab, Cabin, Interior panel, Space craft etc.
Automobile Car body, Tire Cord, Airbag, Seatbelt, Head Liner, Door trim, etc.
Train Front region, Cab, Cabin, Interior panel, Hood, Roof etc.
Ship or Vessel Body, Cab, Cabin, Interior panel, Anchor, Rubber boat etc.